Chemical Reaction Engineering The concentration of A in a first order reaction, A → B, decreases Linearly with time Exponentially with time Logarithmically with time Very abruptly towards the end of the reaction Linearly with time Exponentially with time Logarithmically with time Very abruptly towards the end of the reaction ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering "A spherical porous catalyst particle of radius R is subjected to reactant A which reacts to form B by a zero order surface reaction A → B. Film mass transfer resistance is negligible and pore diffusion of A is rate controlling. The effectiveness factor of the catalyst is reported as 7/8. Which of the following statement is true?A. Inner catalyst core of radius R/8 does not participate in reaction." Inner catalyst core of radius R/8 does not participate in reaction Inner catalyst core of radius 7R/8 does not participate in reaction Inner catalyst core of radius R/2 does not participate in reaction Ffectiveness factor for a zero order reaction can not be 7/8 as it must always be 1 Inner catalyst core of radius R/8 does not participate in reaction Inner catalyst core of radius 7R/8 does not participate in reaction Inner catalyst core of radius R/2 does not participate in reaction Ffectiveness factor for a zero order reaction can not be 7/8 as it must always be 1 ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Maximum equilibrium conversion for endothermic reaction is obtained at the __________ temperature. Lowest possible Intermediate Highest possible Room Lowest possible Intermediate Highest possible Room ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering A gaseous reactant is introduced in a mixed reactor of 3 litres volume at the rate of 1 litre/second. The space time is __________ seconds. 1 32 43833 3 1 32 43833 3 ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The rate constant of a chemical reaction increases by 100 times when the temperature is increased from 400 °K to 500 °K. Assuming transition state theory is valid, the value of E/R is 8987°K 8621°K 8764°K 9210°K 8987°K 8621°K 8764°K 9210°K ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Helium-mercury method is used for the measurement of the __________ of the catalyst. Porosity Surface area Both B & C Pore volume Porosity Surface area Both B & C Pore volume ANSWER DOWNLOAD EXAMIANS APP
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